有没有一种简单的方法可以在 3D 曲面图中定义“单色色彩图”？

Question

以下 MWE 完全符合我的要求。我只是想知道是否有更简单、“规范”的方式来指定颜色图，因为我只想要黑线。

\documentclass{standalone}
\usepackage{pgfplots}
\pgfplotsset{compat=1.16}
\begin{document}
\begin{tikzpicture}
  \begin{axis}[view={300}{30}, hide axis=true, ticks=none, unit vector ratio=1.5 1.5 1, line join=round]
    \addplot3[surf, samples=61, domain=-5:5, line width=0.2pt, fill=white, colormap={bw}{gray(0cm)=(0);gray(1cm)=(0);}] {sin(deg(x*y/5))*cos(deg(x*y/2))};
  \end{axis}
\end{tikzpicture}
\end{document}

Answer 1

您可以更简单地定义颜色图，例如通过colormap={bw}{color=(black) color=(black)}。但您也可以按以下方式进行。请参阅代码注释中的详细信息。

% used PGFPlots v1.16
\documentclass[border=5pt]{standalone}
\usepackage{pgfplots}
    \pgfplotsset{
        compat=1.16,
        % load a colormap that already included black
        % (either at the beginning or at the end)
        colormap/blackwhite,
    }
\begin{document}
\begin{tikzpicture}
    \begin{axis}[
        view={300}{30},
        hide axis=true,
        ticks=none,
        unit vector ratio=1.5 1.5 1,
        line join=round,
        samples=61,
    ]
        \addplot3 [
            surf,
            line width=0.2pt,
            fill=white,
            % set the `point meta` value to a constant value
            point meta=0,
        ] {sin(deg(x*y/5))*cos(deg(x*y/2))};
    \end{axis}
\end{tikzpicture}
\end{document}

Answer 2

你似乎正在寻找一个mesh情节，而不是surf。

\documentclass{standalone}
\usepackage{pgfplots}
\pgfplotsset{compat=1.16}
\begin{document}
\begin{tikzpicture}
  \begin{axis}[view={300}{30}, hide axis=true, ticks=none, unit vector ratio=1.5 1.5 1, line join=round]
    \addplot3[mesh, samples=61, domain=-5:5, line width=0.2pt,draw=gray] {sin(deg(x*y/5))*cos(deg(x*y/2))};
  \end{axis}
\end{tikzpicture}
\end{document}